Compressed air motor



Nov. 27, 1934- J. E. PELTIER COMPRESSED AIR MOTOR Filed May 15, 1933 3 Sheets-Sheet 1 ATTORN EYs Nov. 27, 1934. J. E. PELTIER COMPRESSED AIR MOTOR Filed May 15, 1933 s heets-Sheet 2 INVENTOR Jm vimf r ATTORNEYS Nov. 27, 1934. .1. E. P EL TIER COMPRESSED AIR MOTOR 3 Sheets-Sheet 3 Filed May 15, 1955 'Jase kztpzmr INVENTOR ATTOR N EYS Patented Nov. 27, 1934 UNITED STATES PATENT OFFICE COMPRESSED MOTOR Robb Application May 15, 1933, Serial No. 671,248

Claims.

111111.111 power.

With these and other objects in view this invention consists in certain novel features of.

construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my inven tion, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a side elevation illustrating a compressed air motor constructedin accordance with my invention. I

Figure 2 is a fragmentary side elevation partly in section illustrating the same.

Figure 3 is a top plan view partly in section illustrating the device.

Figure .4 is a transverse sectional view taken on the line 44 of Figure 2.

Figure 5 is a similar view taken on theline 5-5 of Figure 2..

Figure 6 is an end view illustrating the device.

Figure '7 is a detail view showing the means for imparting a step by step movement to the pressure release medium.

Figure 8 is a similar view taken at right angles to that shown in Figure 7.

Figure 9 is a detail sectional view taken on the line 9-9 of Figure 3.

Figure 10 is a similar view showing the coinpanion oscillating control valve to that shown in Figure 9.

Figure 11 is a fragmentary perspective view illustrating the construction of one end of a cam bar.

Figure 12 is a fragmentary perspective view illustrating the cam faces upon one end of an exhausting medium actuated by the cam bar.

Figure 13'is a diagrammatical view illustrating the movements taken by the cam bar during the operation of the device.

meral 1 indicates a base having mounted thereon abutting and alining blocks 2, 3 and 4. The blocks 2 and 4 have chambers 5 to receive compressed air from a reservoir 6 through feed pipes 7, the latter having check valves 8 to prevent back pressure from the chambers 5 to the reservoir. A power driven compressor 9 is connected to the reservoir 6 for building up air pressure therein. The block 3 is provided with a cylindrical chamber 10 in which is rotatably mounted a pressure exhaust mechanism 11 and. the latter has formed in its periphery relatively spaced pockets or grooves 12 which are adapted to consecutively aline or register with passages 13 and 14. The passage 14 communicates with an excated in the manifold to prevent atmospheric air from entering the passage 14 but which will open to permit passage of air pressure from the passage 14 into the manifold.

Corresponding sides of the blocks 2, 3 and 4 are provided with alining cylinders 17 and the cylinders of the blocks 3 and 4 communicate with intake manifolds 18, one of which communicates with the chamber 5 of the block 2 and the other haust manifold 15 and a check valve 16 is 10- communicates with the chamber 5 of the block 4 to permit air pressure from the chambers 5 to enter the cylinders and the intake manifolds are controlled by oscillating valves 19. The cylinders 17 open outwardly through the side faces of the blocks and areclosed by removable cover plates 20 and .the cylinder 17 of the block 3 communicates with the passage 13. A drive bar 21 is slidably mounted in the cylinders and has one end connected to a crank 22 of a power take-off shaft 23 by a pitman 24. The shaft 23 is journaled in standards 25 carried by the base 1 and has secured thereto a fly wheel 26. The drive bar 21 carries a piston 27 operating within the cylinders of the blocks and also in the pockets or grooves 12 of the exhaust mechanism 11. It is to be understood that the cylinders aline and in that way form a continuous cylinder for the drive bar and piston to slide in. The oscillating valves 19 carry pins 28 which enter the ends of the cylinders to be engaged by the piston 27 when the latter reaches the end of its stroke in either direction for the purpose of imparting movement to the valves in one direction. The drive bar 21 carries pins 29 entering the intake manifolds for the purpose of moving the valves in an opposite direction when the piston reaches the end of its stroke in either direction. In Figures 2 and I 3 it will be observed that the oscillating valves Referring in detail to the drawings, the nuand their operating means are so arranged that air pressure from the chambers 5 of the blocks 2 and 4 will be alternatingly admitted to the ends of the cylinder so that the piston will be driven in opposite directions and on each of its strokes will be acted upon by air pressure.

The intake manifolds 18 besides having the oscillating valves 19 are provided with manually controlled valves 30, the handles of which are located exteriorly of the blocks 2 and 3 so that the air pressure from the chambers 5 may be regulated through the intake manifolds to the cylinder or entirely closed to said cylinder when desired.

The pressure exhaust mechanism 11 is secured to a shaft 31 terminating at one end adjacent the power take-off shaft 23 and has secured thereto a star-wheel 32 to be engaged by oppositely arranged projections 33 secured to a disc 34 secured to the shaft 23. During the rotation of the shaft 23, the shaft 31 is given a step by step movement for moving the pockets 12 into and out of registration with the cylinder of the block 3 and the passage 14. The step by step movement of the pressure exhaust mechanism 11 takes place at the end of each stroke of the piston so that the pocket in communication with the cylinder of the block 3 and having air pressure therein from said cylinder will be moved out of communication with said cylinder, trapping the air pressure in the pocket which remains therein until the respective pocket communicates with the passage 14 whence it may exhaust into the exhaust manifolds 15. The passage 14 is formed in the block 3 while the exhaust manifolds are formed in the blocks 2 and 4, as shown in Figure 2 and to aid in expelling air from each pocket 12 as it registers with the passage 14, a plunger 35 is provided and is slidably mounted in the passage 14. The plunger closes the passage 14 where it opens outwardly through the face of the block 3 at all times. The ends of the plunger which is of elongated formation carry cam elements 36 engaged by coil springs 37 urging the plunger outwardly against a cam operating bar 38. The cam operating bar 38 is mounted on the blocks for sliding movement both endwise and transversely of the device. The cam elements 36 each have oppositely inclined cam faces 39 and also are provided with cam faces 40 inclining laterally of the cam faces 39. The bar,38 is provided with cam faces 41 and 42 and which cam faces are arranged oppositely to each other, as shown in Figure 11. The bar 38 at the ends of the cam faces 41 and 42 is provided with cam faces 43 and 44. The cam faces 43 and 44 are to engage the cam faces 40 of the cam elements 36 to cause transverse or lateral shifting of the bar, this movement taking place at the. end of each endwise stroke of the bar. The cam faces 42 and 41 are to act upon the cam faces 39 of the cam elements 36 tocause inward movement of the plunger to expel the air from the pocket which is in registration with the passage 14. During the movement of the bar 38 in one direction, the cam face 41 acts upon the plunger while the movement of the bar in an opposite direction, the cam face 42 acts upon the plunger. The bar 38 is connected to a pitman head 44 slidably mounted in guides 45 and the head is connected to one end of a pivotally mounted lever 46 which has its opposite end connected to a crank 4'7 of the crank shaft 23 by a connecting rod 48. Thus it will be seen that the bar is reciprocated by the rotation of the crank shaft 23 and the connection between the bar and the pitman head 44 is such that it will permit transverse or sidewise movement of the bar when the latter reaches the end of each of its strokes.-

The cam bar 38 acting upon the plunger forces the air from the pocket which is in communication with the passage 14 and when the plunger is permitted to move outwardly of the respective pocket by the cam bar it will create in the pocket a partial vacuum so that when the pocket again registers with the cylinder no resistance will be offered to the piston 27 in opposition to the air pressure acting to drive the piston in a given direction.

In operation, the air pressure from the chambers 5 of the blocks 2 and 4 is alternatingly admitted to the ends of the cylinder by the oscillating valves to act on and drive the piston in opposite directions with said piston receiving a force thereon during its movement in either direction. As the piston reaches the end of each stroke the exhaust mechanism 11 receives a partial rotation to move the pocket which is in communication with the cylinder out of communication with the latter and position the adjacent pocket in communication with the cylinder. The pockets having air trapped therein during the various movements of the exhaust mechanism 11 will one at a time communicate with the passage 14 where the air may exhaust to the exhaust manifolds l5 and be aided in its passage to the exhaust manifolds by the inward movement of the plunger 35. It is to'be understood that the plunger is timed with the step by step movement of the exhaust mechanism 11 so that the plunger may enter and exit from a pocket during the interval in which the exhaust mechanism 11 is remaining idle.

It is to be understood that the pocket of the exhaust mechanism 11 which is in communication with the cylinder has air pressure therein which has acted to drive the piston on its working stroke and as the latter reaches the end of its working stroke, the exhaust mechanism is given a partial rotation so as to move that pocket which is in communication with the cylinder out of communication wlth the latter thereby freeing the piston from any back pressure when it moves in the opposite direction. The pocket as it moves out of registration with the cylinder has the air pressure thereof trapped therein until said pocket communicates with the passage 14 then, through the aid of the plunger, the respective pocket is freed of the air pressure by the latter exhausting to the exhaust manifolds.

While I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction, combination and arrangement of-parts may be made without departing from the spirit and scope of my invention, as claimed.

Having described the invention, I claim:

1. A compressed air motor including a base supporting a power take-off shaft, a compressed air supply means, end and intermediate blocks on the base and each having a chamber, a cylinder carried by said blocks, means connecting the chambers of the end blocks to said compressed air supply means, a piston connected to said shaft and slidable in the cylinder, oscillating valves between the ends of the cylinder and the chambers of the end blocks, means carried by the piston to actuate.

the valves for alternatingly admitting air pressure to opposite sides of the piston for reciprocating the latter, an exhaust mechanism journaled in the chamber of the intermediate block and having spaced pockets, said chamber of the intermediate block having communication with the cylinder to permit the pockets to successively communicate with the cylinder to receive air from the cylinder to exhaust the latter, means to impart a step by step movement to the exhaust mechanism from the shaft, and means for exhausting air from the pockets of the exhaust mechanism.

2. A compressed air motor including a base supporting a power take-off shaft, a compressed air supply means, end and intermediate blocks on the base and each having a chamber, a cylinder carried by said blocks, means connecting the chambers of the end blocks to said compressed air supply means, a piston connected to said shaft and slidable in the cylinder, oscillating valves between the ends of the cylinder and the chambers of the end blocks, means carried by the piston to actuate the valves for alternatingly admitting air pressure to opposite sides of the piston for reciprocating the latter, an exhaust mechanism journaled in the chamber of the intermediate block and having spaced pockets, said chamber of the intermediate block having communication with the cylinder to permit the pockets to successively communicate with the cylinder to receive air from the cylinder to exhaust the latter, means to impart a step by step movement to the exhaust mechanism from the shaft, a slidable plunger carried by the intermediate block to force air from the pockets of the exhaust mechanism, and means for reciprocating the plunger.

3. A compressed air motor including a base supporting a power take-off shaft, a compressed air supply means, end and intermediate blocks on the base and each having a chamber, 9. cylinder carried by said blocks, means connecting the chambers of the end blocks to said compressed air supply means, a piston connected to said shaft and slidable in the cylinder, oscillating valves between the ends of the cylinder and the chambers of the end blocks, means carried by the piston to actuate the valves for alternatingiy admitting air pressure to opposite sides of the piston for reciprocating the latter, an exhaust mechanism 'jour naled in the chamber of the intermediate block and having spaced pockets, said chamber of the intermediate block having communication with the cylinder to permit the pockets to successively communicate with the cylinder to receive air from the cylinder to exhaust the latter, means to impart a step by step movement to the exhaust mechanism from the shaft, a slidable plunger carried by the intermediate block to force air from the pockets of the exhaust mechanism, tension means forurging the plunger in one direction, and cam means operated by the shaft to operate the plunger in an opposite direction.

4. A compressed air motor including a base supporting a power take-off shaft, a compressed -der carried by saidblocks, means connecting the air supply means, end and intermediate blocks on the base and each having a chamber, a cylinder carried by said blocks, means connecting the chambers of the end blocks to said compressed air supply means, a piston connected to said shaft and slidable in the cylinder, oscillating valves between the ends of the cylinder and the chambers of the end blocks, means carried by the piston-to actuate the valves for alternatingly admitting air pressure to opposite sides of the piston for reciprocating the latter, an exhaust mechanism journaled in the chamber of the intermediate block and having spaced pockets, said chamber of the intermediate block having communication with the cylinder to permit the pockets to suecessively communicate with the cylinder to receive air from the cylinder to exhaust the latter, means to impart a step by step movement to the exhaust mechanism from the shaft, a slidable plunger carried by the intermediate block to force air from the pockets of the exhaust mechanism, tension means for urging the plunger in one direction, cam elements on the plunger and a slidably mounted cam bar reciprocated by the shaft for moving the plunger in an opposite direction.

5. A compressed air motor including a base supporting a power take-01f shaft, a compressed air supply means, end and intermediate blocks on the base and each having a chamber, a cylinchambers of the end blocks to said compressed air supply means, apiston connected to said shaft and slidabie in the cylinder, oscillating valves between the ends of the cylinder and the chambers of the end blocks, means carried by the piston to actuate the valves for alternatingly admitting air pressure to opposite sides of the piston for reciprocating the latter, an exhaust mechanism journaled in the chamber of the intermediate block and having spaced pockets, said chamber of the intermediate block having communication with the cylinder to permit the pockets to suecessively communicate with the cylinder to receive air from the cylinder to exhaust the latter, means to impart a step by step movement to the exhaust mechanism from the shaft, a slidable plunger carried by the intermediate block to force air from the pockets of the exhaust mechanism, tension means for urging the plunger in one direction, cam elements on, the plunger and a slidably mounted cam bar reciprocated by the shaft for moving the plunger in an opposite direction, and manually controlled means for regulating the air pressure from the chambers of the end blocks to the cylinder.

JOSEPH E. PELTIER. 

